纯电动汽车用动力电池性能评价方法研究

通过分析纯电动汽车用动力电池的放电特性,指出了目前对纯电动汽车用动力电池性能采用恒流放电方式进行评价不能较好地反映动力电池的实际使用性能.以ECE循环工况作为纯电动汽车常用工况,计算了EVERY电动汽车的放电电流特性,并与实验结果进行对比,表明计算结果与实验结果基本一致.在ECE循环工况时,动力电池的放电特性能够基本上反映纯电动汽车在实际使用工况下的放电特性,以该方法建立非恒流放电方式替代目前采用的恒流放电方式对纯电动汽车用动力电池的实际使用性能进行评价将更为有效.

Study on Methods for Assessing Performance of Power Batteries Used in Pure Electric Vehicle

Based on the analysis of the discharge characteristics of power batteries used in pure electric vehicle,this paper pointed out the shortage of using the constant current discharge method to assess the performance of the batteries,because the results could not represent the real using performance of the batteries.According to Economic Commission for Europe(ECE) cycle,the discharge current value of a pure electric vehicle,EVERY,was calculated,which had the same trend as the experimental results.The discharge characteristics of power batteries can basically represent their using performance.So,it is more effective to use the inconstant current discharge method according to ECE cycle to assess the performance of power batteries rather than the constant current method.